Funky and daisy are the fastest middle and heavy characters so they are used in almost all WRs with a few exceptions. The difference is that funky is faster then daisy but daisy has the mach bike which has the best drift in the game. Funky is better on most tracks but on tracks with a lot of tight turns and not much straightaways the mach bike can be better. Examples of tracks Mach bike is better on are DC, MC3, rDKM and rBC64. Also daisy on mach can be easier to do some glitches with then the flame runner. For example CM, NKJP (uses yoshi but still mach)and the BC spiral skip cut.

Daisy is the best character for her weight class, and funky is all round good states. Not too much is different

their stats in detail:

https://www.google.com/search?q=mkwii+character+stats&tbm=isch&ved=2ahUKEwiv8Z_Iu67oAhVb9qwKHTbUA5sQ2-cCegQIABAA&oq=mkwii+character+stats&gs_l=img.3..0.6740.8637..8879...0.0..0.82.724.10......0....1..gws-wiz-img.......0i7i30.RUUb2spg3zg&ei=YY13Xu-8CtvsswW2qI_YCQ&rlz=1CANQDY_enUS817#imgrc=lQTvpZY_Wl63wM

"Funky and daisy are the fastest middle and heavy characters" Birdo, Bowser Jr., Middleweight Mii and Dry Bowser would like to have a few words.

@Black-Shadow Just look at this:

"Birdo, Bowser Jr., Middleweight Mii and Dry Bowser would like to have a few words."

There is a reason 99% of TT WRs use Funky and Daisy. The last time I remember a WR with Mii was TWD98's MT Ultra.

@NicoPlaysThings Dry Bowser with no speed boost is faster than Funky Kong with +4 speed boost. https://qph.cf2.quoracdn.net/main-qimg-82cb566c3e5b358c2dc26f7e69d9e1f2

Source: https://sportdoggy.com/mariokart/wii.cfm

In Mario Kart Wii, the BAR GRAPHS are what matter - not the numbers.